| 1 | import sys, os, math |
| 2 | from . import dispatch, proto, env |
| 3 | from .sp import xhtml |
| 4 | h = xhtml.cons() |
| 5 | |
| 6 | __all__ = ["skeleton", "skelfor", "setskel", "usererror"] |
| 7 | |
| 8 | class skeleton(object): |
| 9 | def page(self, req, title, *content): |
| 10 | return xhtml.forreq(req, h.html(self.head(req, title), h.body(*content))) |
| 11 | |
| 12 | def head(self, req, title): |
| 13 | return xhtml.head(title=title) |
| 14 | |
| 15 | def error(self, req, message, *detail): |
| 16 | return self.page(req, message, h.h1(message), h.p(*detail)) |
| 17 | |
| 18 | def message(self, req, message, *detail): |
| 19 | return self.page(req, message, h.h1(message), h.p(*detail)) |
| 20 | |
| 21 | defskel = env.var(skeleton()) |
| 22 | |
| 23 | def getskel(req): |
| 24 | return [defskel.val] |
| 25 | def skelfor(req): |
| 26 | return req.item(getskel)[0] |
| 27 | def setskel(req, skel): |
| 28 | req.item(getskel)[0] = skel |
| 29 | |
| 30 | class usererror(dispatch.restart): |
| 31 | def __init__(self, message, *detail): |
| 32 | super().__init__() |
| 33 | self.message = message |
| 34 | self.detail = detail |
| 35 | |
| 36 | def handle(self, req): |
| 37 | return skelfor(req).error(req, self.message, *self.detail) |
| 38 | |
| 39 | class message(dispatch.restart): |
| 40 | def __init__(self, message, *detail): |
| 41 | super().__init__() |
| 42 | self.message = message |
| 43 | self.detail = detail |
| 44 | |
| 45 | def handle(self, req): |
| 46 | return skelfor(req).message(req, self.message, *self.detail) |
| 47 | |
| 48 | class httperror(usererror): |
| 49 | def __init__(self, status, message=None, detail=None): |
| 50 | if message is None: |
| 51 | message = proto.statusinfo[status][0] |
| 52 | if detail is None: |
| 53 | detail = (proto.statusinfo[status][1],) |
| 54 | super().__init__(message, *detail) |
| 55 | self.status = status |
| 56 | |
| 57 | def handle(self, req): |
| 58 | req.status(self.status, self.message) |
| 59 | return super().handle(req) |
| 60 | |
| 61 | class notfound(httperror): |
| 62 | def __init__(self): |
| 63 | return super().__init__(404) |
| 64 | |
| 65 | class redirect(dispatch.restart): |
| 66 | bases = {"url": proto.requrl, |
| 67 | "script": proto.scripturl, |
| 68 | "site": proto.siteurl} |
| 69 | |
| 70 | def __init__(self, url, status=303, base="url"): |
| 71 | super().__init__() |
| 72 | self.url = url |
| 73 | self.status = status |
| 74 | self.bases[base] |
| 75 | self.base = base |
| 76 | |
| 77 | def handle(self, req): |
| 78 | req.status(self.status, "Redirect") |
| 79 | req.ohead["Location"] = proto.appendurl(self.bases[self.base](req), self.url) |
| 80 | req.ohead["Content-Length"] = 0 |
| 81 | return [] |
| 82 | |
| 83 | class unmodified(dispatch.restart): |
| 84 | def handle(self, req): |
| 85 | req.status(304, "Not Modified") |
| 86 | req.ohead["Content-Length"] = "0" |
| 87 | return [] |
| 88 | |
| 89 | class fileiter(object): |
| 90 | def __init__(self, fp): |
| 91 | self.fp = fp |
| 92 | |
| 93 | def __iter__(self): |
| 94 | return self |
| 95 | |
| 96 | def __next__(self): |
| 97 | if self.fp is None: |
| 98 | raise StopIteration() |
| 99 | data = self.fp.read(16384) |
| 100 | if data == b"": |
| 101 | self.fp.close() |
| 102 | self.fp = None |
| 103 | raise StopIteration() |
| 104 | return data |
| 105 | |
| 106 | def close(self): |
| 107 | if self.fp is not None: |
| 108 | self.fp.close() |
| 109 | self.fp = None |
| 110 | |
| 111 | class fileresp(dispatch.restart): |
| 112 | def __init__(self, fp, ctype, charset=None, cachable=True): |
| 113 | self.fp = fp |
| 114 | self.ctype = ctype |
| 115 | if charset is None and ctype.startswith("text/"): |
| 116 | charset = sys.getdefaultencoding() |
| 117 | self.charset = charset |
| 118 | self.cachable = cachable |
| 119 | |
| 120 | def handle(self, req): |
| 121 | sb = None |
| 122 | if hasattr(self.fp, "fileno"): |
| 123 | sb = os.fstat(self.fp.fileno()) |
| 124 | if self.cachable and sb and sb.st_mtime != 0: |
| 125 | if "If-Modified-Since" in req.ihead: |
| 126 | rtime = proto.phttpdate(req.ihead["If-Modified-Since"]) |
| 127 | if rtime is not None and rtime >= math.floor(sb.st_mtime): |
| 128 | raise unmodified() |
| 129 | req.ohead["Last-Modified"] = proto.httpdate(sb.st_mtime) |
| 130 | ctype = self.ctype |
| 131 | if self.charset is not None: |
| 132 | ctype += "; charset=%s" % (self.charset) |
| 133 | req.ohead["Content-Type"] = ctype |
| 134 | if sb and sb.st_size > 0: |
| 135 | req.ohead["Content-Length"] = str(sb.st_size) |
| 136 | return fileiter(self.fp) |